Key puller



Dec. 27, 1927.

C. W. LYNCH KEY FULLER 2 Sheets- Sheet 1 (Driginal Filed Amer. 27. 1925Dec. 27, 1927. 1,653,715 c. w. LYNCH KEY FULLER Original Filed Au 27.1925 2 Sheets-Sheet 2 INVENTOR ATTORNEY WITNESS:

Patented Dec. 27, 1927.

" UNITED STATES PATEN 1,653,715 T [OFFICE],

cannons Wnsnnr LYNCH, or rnnnr, oxnnrrolvrn, nss'renon T MARION MAC INErocnnnv & surr Y COMPANY, or MAR-ION, INDIANA. i

.KEY FULLER.

Application filed August 27,- 1925, Serial no, 52,871. Renewed November12, 192?.

This invention relates to tools used by mechanics, machinists andothers, and has for its object the provision of a novel device by meansof which a key for holding a pulley or other element may be quickly andeasily removed.

An important object is theprovislon of a device of this characterwhichis provided with screw operating means whereby great leverage may beexerted upon the key for effecting extraction thereof, the deviceembodying a peculiar clamping mechanism which will operate to hold a keyfirmly, regardless of the size or shape thereot and likewise regardlessof whetherthe condltion Y be. good or bad, as for instance, resultingiii from battering or prolonged use.

Still another objectis to provide a device of this character which willbe easy to apply and adjust, positive in action, efficient. and durablein service, and a generalfimprovemont in the art. I

With the above and other objects and advantages in view,.the inventionconsists in the details of construction and the arrangement andcombination of parts to be hereinafter more fully described and claimed,and illustrated in the accompanying drawings, inwhichz Figure 1 is aside elevation of the device showing it engaged upon a key and in theact ofpulling the same, a shat't and pulley or other element beinglikewise represented.

Figure 2 is a cross" sectional view through the device itself.

Figure 3 is a top plan view thereof.

Figure 4 is a cross section taken on the line l4; of Figure 2.

Figure 5 is adetail section taken on the line 5-5 of Figure 2.

Referring more particularly to the drawings, the letter A designates asupporting shaft upon which is mounted, by means of a key B, a pulley orother element 0. As is well known, keys of this type litwithin grooves Dand E in the shaft and pulley or other element C, respectively.

In carrying out the invention, I provide a puller which comprises a pairof similar bloclelike members through which extend transversely arrangedbolts 11 which pass through smooth bores 12 in one member and which arethreaded into holes 13 in theother member, as clearly indicated inFigure 2. i It is intended that there be sulticient play in slidablyengaged slips'or wedge elements 15 whichcooperate to provide clampingmeans lor engaging the key B. It is preferable that the confrontingfaces of these slips 01' wedge members be corrugated or otherwiseroughened, as clearly indicated in Figure 5, so as to insure a propergrip upon the key. Obviously, the slips 15 illustrated may be re placedby others which are smaller, or larger,

as the case may be, depending upon the nature or" the key or keys to beextracted by means of the device.

One member 10, preferably the one equipped with the threaded holes 13,is formed with other threaded holes 16 into which are screwed adjustingboltsll'which have their ends engaging withinsockets 18 in the othermember 10, so that by turning these bolts 17, the clamping action of themembers 15 upon the key may be made very firm so that sl'ippage evenunder the most adverse circumstances Will be positively prevented.

Threaded longitudinally through the end portions of the members 10are'bolts or set screws 18 which are adapted to bear against theconfronting face of the pulley C orother device held by the key, inorder to provide the necessary purchase for effecting extraction of thekey.

In the operation of the device, it is tobe understood that the bolts 17and 11 must be loosened or turned in a counter-clockwise direction inorder that the members 15 will be spaced a sufiicient distance apartthat the key B maybe located between them. The

device is then placed upon the key with one 1 end'spaced slightly awayfrom the pulley or other element C held by the key. It is then necessarythat the bolts 11 and 17 be turned down or in, so as to draw the members15 into firm clamping engagement with the key, subsequently to which thebolts 18, or set screws, as they may be termed, are screwed in untiltheyengage against thepulley or other member C. These bolts be turnedoil alternately or simultaneously, this detail being immaterial, and itis quite ob- 5 the 1a vious Lthagt ins tih ey bear -againstwthc m cmjherC, the entire derioe forihedi by the two Ineinhe 10 will be moved awayfrom the u we g 4 in which it is engaged.

From the foregoing description under study of ihe drawings, itwill beapparent that I have thus*provided ii very simply constructed .andnexpensive and easily ap- 5!? .labor and .gmnoyzince in: facilitatingthe extraction of holding keys used in connection with various; types ofmachine elements. It is believed that the construction, operation endirlmntages will he rezidily apparent to i skilledili the art withoutflilthl' e51 pialliltlOli.

I have e hown and described the "While fn'eTrred embodiment of theinvention, it

sho nldhe understood than; I reserve (The right to nekc such chengcsfinthe form, construcfio raiid arrangement of parts as will ,not departfrom 'tlid's13iritofil5the invention or the scope of the; sub-joinedclaims. 4 Having thus' described the invention, 1

CiEl iIHZ- i 1. Means for extracting a keyholding a meniher upon 21shaft, comprising a pair of .siinil or members {provided aftheirconfronting faces with grooves, ci s nping members i nionnted Withinseid gnoovesior engagement upon the key toj he extracfied, screwi meansholding said members together in in' no a-hie relogtion to the key and"other screw means arranged at right angles to the first njihmed ieiliwriih it, that ln 11:, njfr mmega-ew s new rne ms h nd engiygepihie withthe memhi-r thrmigh which the key passes whereby to apply pressurel'hercugainst for extracting ikfiye 1 i .zkqdemkte of thewhirl-meterdescribed, comprising a pair of similar block-like ine1nhersone providedwith a. pair of smooth bores and 'the other being provided with a pairoi.=thre:ided holes registering *therewith, heirs pzlesmg through saidsmooth bores and fhroziiicd holes, tone'o f said lliBiTliJBTS dieingformed with sockets and theofiher being pro videciflvit hqoqher threadedholes, :1 second set of holtsftihrended through said second named'threaded'hoies mid engaging within said sockets, the confronting facesof said Hi B iiIiJG iS being grooved, clamping elonmni's um-(1111;flengzrged wifliin the grooves, mid screws threaded longitudinidlythrough 5 id members and engagenbie Wifll :1 relatively station a ryabuinicnt.

A device of the character described compriing a pair of similar membersmved at their confronting faces, clen'ipin g 11 101111) s detochahlymounted within the grooves and adapted for engagement upon :1

key tobe extracted from engnq ement with a shaft and a member carriedhereby, o p1urnlity of sets of ecrew 1110111130128 paseinp; through andengaging said clamping members for oil eting innnovzihle relationthereof with respect to the keg. to be (5Xt1'fl0i6(i,fll1fl :1 set ofother screw members threaded 1ongitndinaiiy fl rougli the clampinginembere at right nnglesi'o the first named set of screw members Qanfdengageable with the memher carried by the shaft;

"ln testimony whereof I afiix my signature.

CHARLES WESLEY LYNCH.

